Plate heat exchanger with automatic cleaning function

Abstract

The utility model discloses an automatic cleaning plate heat exchanger which comprises a plurality of heat exchange plates which are sequentially arranged at intervals and further comprises a plurality of sets of cleaning mechanisms. The cleaning mechanism comprises a movable bracket, a cleaning piece and a driving piece; each cleaning piece is arranged in a gap between every two adjacent heat exchange plates; one end of the movable bracket is connected with a swing mechanism, and the other end of the movable bracket is rotationally connected with a mounted bearing through a rotating shaft; the driving piece is in driving connection with the swinging mechanism; the driving piece drives the swing mechanism to swing, the connecting rod rotates along with swing of the swing mechanism, the cleaning piece is driven to swing on the heat exchange plate in a reciprocating mode, and therefore impurities on the heat exchange plate are cleaned through friction and collision between the cleaning piece and the heat exchange plate, and the heat exchange plate can be cleaned without shutdown. And ash and impurity removal treatment can be carried out on the plate heat exchanger without manual work. And the requirement for manual cleaning is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, and in particular relates to an automatic cleaning plate heat exchanger. Background Art

[0002] Laser welded gas-gas plate heat exchanger is a heat exchange device commonly used for indirect heat transfer between gases. Industrial kilns produce a large amount of high-temperature flue gas during operation. These high-temperature flue gases contain rich thermal energy, so laser welded gas-gas plate heat exchangers are generally used to recover waste heat. Traditional plate heat exchangers are generally composed of multiple heat exchanger plates stacked in sequence. For example, the Chinese patent with publication number CN2232138Y discloses a polymer resin coated metal plate heat exchanger, and the heat exchanger plates of this prior art are also stacked and fixed in sequence.

[0003] However, since the high-temperature flue gas generated by industrial kilns contains a large amount of impurities such as dust and debris, these impurities are easily adsorbed or adhered to the plates of the heat exchanger during the heat exchange process. Over time, these accumulated impurities will not only significantly reduce the heat exchange efficiency on the surface of the plate, affecting the overall heat exchange effect, but may also cause additional burden on the fan of the industrial kiln. As a result, the operating pressure of the fan increases, the power increases, the power consumption also increases, and the electricity cost also rises sharply. To address this problem, the traditional solution is to arrange workers to frequently clean the heat exchanger plates. However, since manual cleaning requires shutdown for cleaning, and the high-temperature gas in the industrial kiln is not suitable for workers to enter, the manual cleaning effect is not good. At the same time, shutdown for cleaning will also affect the progress of work and cause additional increase in production costs.

[0004] Therefore, there is an urgent need for an automatic cleaning plate heat exchanger to achieve dust and impurity removal of the laser welded gas-to-gas plate heat exchanger without stopping the machine and relying on manual labor. Summary of the invention

[0005] In view of the problems in the related technology, the utility model proposes an automatic cleaning plate heat exchanger to overcome the above-mentioned technical problems existing in the existing related technology. The utility model sets a movable bracket, a cleaning member and a driving member so that the cleaning mechanism can clean the impurities on the heat exchange plate in time and maintain the cleanliness of the surface of the heat exchange plate, thereby improving the heat exchange efficiency and reducing the demand and cost of manual cleaning.

[0006] The technical solution of the utility model is implemented as follows: an automatic cleaning plate heat exchanger, comprising a plurality of heat exchange plates arranged in sequence and at intervals, and also comprising a plurality of cleaning mechanisms; the cleaning mechanisms comprise a movable bracket, a cleaning member and a driving member; the cleaning member is arranged in the gap between two adjacent heat exchange plates;

[0007] The movable bracket includes a plurality of connecting rods vertically arranged above the heat exchange plate; one end of the cleaning member is connected to the connecting rod, and the other end of the cleaning member is suspended and extends along the length of the heat exchange plate;

[0008] One end of the movable bracket is connected to a swing mechanism, and the other end of the movable bracket is rotatably connected to a seat bearing through a rotating shaft; the driving member is drivingly connected to the swing mechanism; the driving member drives the swing mechanism to swing, and the connecting rod rotates with the swing of the swing mechanism, driving the cleaning member to swing back and forth on the heat exchange plate, thereby achieving dust and impurity cleaning through the friction between the cleaning member and the heat exchange plate.

[0009] Furthermore, each of the cleaning members comprises a plurality of cleaning rods arranged at intervals along the length of the heat exchange plate, and two adjacent cleaning rods are connected by a hinge.

[0010] Furthermore, each of the cleaning sticks is made of a rigid material;

[0011] Preferably, in the present invention, the surface of the cleaning stick is provided with no bristles, and the cleaning and dust removal is mainly achieved by the friction and collision between the cleaning stick and the heat exchange plate;

[0012] Preferably, the head of the cleaning member is welded to the connecting rod; or the head of the cleaning member is fixed to the connecting rod via a connecting member;

[0013] Furthermore, the gap between two adjacent heat exchange plates forms a flue gas flow channel; the number of groups of the cleaning mechanism can be evenly arranged according to the length of the flue gas flow channel;

[0014] The number of the connecting rods is evenly arranged according to the width of the heat exchange plate; in the utility model, each of the movable brackets includes three connecting rods.

[0015] Furthermore, the movable bracket also includes a first connecting plate and a second connecting plate which are parallel to each other, and the two ends of each connecting rod are respectively connected to the first connecting plate and the second connecting plate; the first connecting plate is provided with the rotating shaft on the back side connected to the connecting rod; the inner side of the second connecting plate is connected to the connecting rod, and the outer side of the second connecting plate is connected to the swing mechanism.

[0016] Furthermore, the driving member is a driving motor; the swing mechanism includes a reducer;

[0017] It also includes a dustproof shell, in which the drive motor and the reducer are both arranged; the dustproof shell is provided with a door body and a heat dissipation window; the design of the dustproof shell is conducive to preventing impurities cleaned by the cleaning part from adhering to the drive motor and the reducer, so as to enhance the dustproof effect.

[0018] Furthermore, in the present invention, the driving member may not be a driving motor, and the user may manually control the swinging of the movable bracket, which also has the same effect as the present invention; similarly, the swinging of the movable bracket may also be pneumatically controlled, which also has the same effect as the present invention; the user may choose a suitable driving method according to on-site requirements.

[0019] Furthermore, the reducer includes a housing, and a first rotating member and a second rotating member arranged in the housing; the drive motor includes a motor shaft; the first rotating member includes a first gear drivingly connected to the motor shaft, and a second gear transmission-connected to the second rotating member.

[0020] Furthermore, it also includes a control unit for controlling the operation of the driving motor, and the control unit is connected to the driving motor; the control unit controls the motor shaft to rotate in a forward direction or a reverse direction.

[0021] Further, one end of the second rotating member is transmission-connected to the second gear through a third gear, and the other end of the second rotating member is connected to the second connecting plate; the diameter of the first gear is greater than the diameter of the second gear;

[0022] When the motor shaft rotates in the forward direction, the first gear starts to rotate under the drive of the motor shaft, and the second gear rotates at the same time and drives the first rotating member to rotate, thereby driving the movable bracket to swing;

[0023] When the motor shaft rotates in the reverse direction, the first gear starts to rotate in the reverse direction under the drive of the motor shaft, and the second gear simultaneously rotates in the reverse direction and drives the first rotating member to rotate, thereby driving the movable bracket to swing in the reverse direction;

[0024] In the utility model, the motor shaft drives the movable bracket to rotate forward and reverse by 1 / 8 of a circle.

[0025] Furthermore, on the same connecting rod, the number of the cleaning members is not less than the number of the heat exchange plates; and the total length of the cleaning members is greater than the length of the heat exchange plates.

[0026] Furthermore, the gap between two adjacent heat exchange plates is 2-3 mm.

[0027] Beneficial effects of the utility model:

[0028] (1) The utility model provides an automatically cleaning plate heat exchanger; it includes a plurality of heat exchange plates arranged in sequence and at intervals, and also includes a plurality of cleaning mechanisms; the cleaning mechanism includes a movable bracket, a cleaning member and a driving member; the cleaning member is arranged in the gap between two adjacent heat exchange plates; one end of the movable bracket is connected to a swing mechanism, and the other end of the movable bracket is rotatably connected to a seat bearing through a rotating shaft; the driving member is rotatably connected to the swing mechanism; the driving member drives the swing mechanism to swing, and the connecting rod rotates with the swing mechanism, driving the cleaning member to swing back and forth on the heat exchange plate, thereby achieving dust and impurity removal through the friction between the cleaning member and the heat exchange plate. The utility model is conducive to reducing the need for manual cleaning, maintenance costs and time costs by setting the cleaning mechanism.

[0029] (2) The movable bracket includes a plurality of connecting rods vertically arranged above the heat exchange plate; one end of the cleaning member is connected to the connecting rod, and the other end of the cleaning member is suspended and extends along the length of the heat exchange plate; the length setting of the cleaning member is conducive to covering a larger cleaning area and improving the cleaning efficiency; at the same time, the cleaning member can timely remove dust and impurities on the heat exchange plate, thereby maintaining the cleanliness of the heat exchange plate, thereby improving the heat exchange efficiency and extending the service life of the plate heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural schematic diagram of an automatic cleaning plate heat exchanger of the utility model;

[0031] Figure 2 It is a side view of a self-cleaning plate heat exchanger of the utility model;

[0032] Figure 3 for Figure 2 AA section view;

[0033] Figure 4 This is a schematic diagram of the structure of the cleaning element of the utility model;

[0034] Figure 5 Another structural schematic diagram of an automatic cleaning plate heat exchanger of the utility model;

[0035] Figure 6 This is a schematic diagram of the structure of an automatic cleaning plate heat exchanger of the utility model after removing some components;

[0036] Figure 7 It is a structural schematic diagram of two cleaning mechanism combinations of the utility model.

[0037] Marking Description:

[0038] 1. Heat exchange plate; 2. Movable bracket; 21. Connecting rod; 22. First connecting plate; 23. Second connecting plate; 3. Cleaning member; 31. Cleaning stick; 32. Hinge; 4. Driving motor; 41. Motor shaft; 5. Rotating shaft; 6. Bearing with seat; 7. Swinging mechanism; 71. Housing; 72. First rotating member; 721. First gear; 722. Second gear; 73. Second rotating member; 731. Third gear; 8. Flue gas flow duct. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] like Figure 1-3 As shown, this embodiment provides an automatic cleaning plate heat exchanger, comprising a plurality of heat exchange plates 1 arranged in sequence and at intervals, and also comprising a plurality of cleaning mechanisms; the cleaning mechanism comprises a movable bracket 2, a cleaning member 3 and a driving member; the cleaning member 3 is arranged in the gap between two adjacent heat exchange plates 1;

[0042] The movable bracket 2 includes a plurality of connecting rods 21 vertically arranged above the heat exchange plate 1; one end of the cleaning member 3 is connected to the connecting rod 21, and the other end of the cleaning member 3 is suspended and extends along the length of the heat exchange plate 1; the length setting of the cleaning member 3 is conducive to covering a larger cleaning area and improving the cleaning efficiency;

[0043] One end of the movable bracket 2 is connected to a swing mechanism 7, and the other end of the movable bracket 2 is rotatably connected to a seat bearing 6 through a rotating shaft 5; the driving member is drivingly connected to the swing mechanism 7; the driving member drives the swing mechanism 7 to swing, and the connecting rod 21 rotates with the swing of the swing mechanism 7, driving the cleaning member 3 to swing back and forth on the heat exchange plate 1, thereby achieving dust and impurity cleaning through the friction between the cleaning member 3 and the heat exchange plate 1.

[0044] Specifically, Figure 4 As shown, each of the cleaning members 3 includes a plurality of cleaning rods 31 arranged at intervals along the length of the heat exchange plate 1, and two adjacent cleaning rods 31 are connected by a hinge 32;

[0045] In this embodiment, by providing a movable bracket 2, a cleaning member 3 and a driving member, the cleaning mechanism can clean the impurities on the heat exchange plate 1 in time, maintain the cleanliness of the surface of the heat exchange plate 1, and thus improve the heat exchange efficiency.

[0046] Specifically, each of the cleaning sticks 31 is made of a rigid material;

[0047] Specifically, in this embodiment, the surface of the cleaning stick 31 is provided without bristles, and the cleaning and dust removal is mainly achieved by the friction and collision between the cleaning stick 31 and the heat exchange plate 1;

[0048] Specifically, Figure 5 As shown, the head of the cleaning member 3 is welded to the connecting rod 21; or the head of the cleaning member 3 is fixed to the connecting rod 21 via a connecting member;

[0049] like Figure 7 As shown, the gap between two adjacent heat exchange plates 1 forms a flue gas flow channel 8; the number of groups of the cleaning mechanism can be evenly arranged according to the length of the flue gas flow channel 8; this embodiment can be as follows Figure 7 As shown, two groups of cleaning mechanisms are provided according to the length of the flue gas flow channel 8;

[0050] The number of the connecting rods 21 is evenly arranged according to the width of the heat exchange plate 1 ; in this embodiment, each of the movable brackets 2 includes three connecting rods 21 .

[0051] Specifically, Figure 2 and Figure 5As shown, the movable bracket 2 also includes a first connecting plate 22 and a second connecting plate 23 which are parallel to each other, and the two ends of each connecting rod 21 are respectively connected to the first connecting plate 22 and the second connecting plate 23; the first connecting plate 22 is provided with the rotating shaft 5 on the back side connected to the connecting rod 21; the inner side of the second connecting plate 23 is connected to the connecting rod 21, and the outer side of the second connecting plate 23 is connected to the swing mechanism 7.

[0052] like Figure 6 As shown, the driving member is a driving motor 4; the swing mechanism 7 includes a reducer;

[0053] It also includes a dustproof shell, in which the drive motor 4 and the reducer are both arranged; the dustproof shell is provided with a door body and a heat dissipation window; the design of the dustproof shell is conducive to preventing impurities cleaned by the cleaning member 3 from adhering to the drive motor 4 and the reducer, so as to enhance the dustproof effect.

[0054] Specifically, in this embodiment, the driving member may not be the driving motor 4, and the user manually controlling the swing of the movable bracket 2 also has the same effect as the present embodiment; similarly, the swing of the movable bracket 2 may also be pneumatically controlled, which also has the same effect as the present embodiment; the user can choose a suitable driving method according to on-site requirements.

[0055] Specifically, the reducer includes a housing 71, and a first rotating member 72 and a second rotating member 73 arranged in the housing 71; the drive motor 4 includes a motor shaft 41; the first rotating member 72 includes a first gear 721 drivingly connected to the motor shaft 41, and a second gear 722 transmission-connected to the second rotating member 73.

[0056] Specifically, it also includes a control unit for controlling the operation of the driving motor 4 , and the control unit is connected to the driving motor 4 ; the control unit controls the motor shaft 41 to rotate in a forward direction or a reverse direction.

[0057] Specifically, one end of the second rotating member 73 is transmission-connected to the second gear 722 via the third gear 731, and the other end of the second rotating member 73 is connected to the second connecting plate 23; the diameter of the first gear 721 is greater than the diameter of the second gear 722;

[0058] When the motor shaft 41 rotates forward, the first gear 721 starts to rotate under the drive of the motor shaft 41, and the second gear 722 rotates at the same time and drives the first rotating member 72 to rotate, thereby driving the movable bracket 2 to swing;

[0059] When the motor shaft 41 rotates in the reverse direction, the first gear 721 starts to rotate in the reverse direction under the drive of the motor shaft 41, and the second gear 722 rotates in the reverse direction at the same time and drives the first rotating member 72 to rotate, thereby driving the movable bracket 2 to swing in the reverse direction;

[0060] In this embodiment, the motor shaft 41 drives the movable bracket 2 to rotate forward and reverse by 1 / 8 of a circle.

[0061] Specifically, Figure 2 As shown, on the same connecting rod 21 , the number of the cleaning members 3 is not less than the number of the heat exchange plates 1 ; and the total length of the cleaning members 3 is greater than the length of the heat exchange plates 1 .

[0062] Specifically, the gap between two adjacent heat exchange plates 1 is 2-3 mm.

[0063] like Figure 2 and Figure 6 As shown, the cleaning process of an automatic cleaning plate heat exchanger described in this embodiment is as follows:

[0064] When the motor shaft 41 rotates forward, the first gear 721 starts to rotate under the drive of the motor shaft 41, and the second gear 722 rotates at the same time and drives the first rotating member 72 to rotate, thereby driving the movable bracket 2 to rotate 1 / 8 of a circle;

[0065] When the motor shaft 41 rotates in the reverse direction, the first gear 721 starts to rotate in the reverse direction under the drive of the motor shaft 41, and the second gear 722 simultaneously rotates in the reverse direction and drives the first rotating member 72 to rotate, thereby driving the movable bracket 2 to rotate in the reverse direction by 1 / 8 of a turn;

[0066] In the above process, the cleaning member 3 keeps swinging with the movable bracket 2, and the impurities on the heat exchange plate 1 are cleaned by the friction and collision between the swinging cleaning member 3 and the heat exchange plate 1, thereby achieving dust and impurity removal processing of the plate heat exchanger without stopping the machine and relying on manual labor.

[0067] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. An automatic cleaning plate heat exchanger, comprising a plurality of heat exchange plates arranged in sequence and spaced apart from each other, characterized in that: It also includes several groups of cleaning mechanisms; the cleaning mechanisms include a movable bracket, a cleaning member and a driving member; the cleaning member is arranged in the gap between two adjacent heat exchange plates; The movable bracket includes a plurality of connecting rods vertically arranged above the heat exchange plate; one end of the cleaning member is connected to the connecting rod, and the other end of the cleaning member is suspended and extends along the length of the heat exchange plate; One end of the movable bracket is connected to a swing mechanism, and the other end of the movable bracket is rotatably connected to a seat bearing through a rotating shaft; the driving member is rotatably connected to the swing mechanism; the driving member drives the swing mechanism to swing, and the connecting rod rotates with the swinging of the swing mechanism, driving the cleaning member to swing back and forth on the heat exchange plate.

2. The self-cleaning plate heat exchanger according to claim 1, characterized in that: Each of the cleaning members comprises a plurality of cleaning rods arranged at intervals along the length of the heat exchange plate, and two adjacent cleaning rods are connected by a hinge.

3. The self-cleaning plate heat exchanger according to claim 2, characterized in that: Each cleaning stick is made of a rigid material.

4. The self-cleaning plate heat exchanger according to claim 1, characterized in that: The movable bracket also includes a first connecting plate and a second connecting plate which are parallel to each other, and the two ends of each connecting rod are respectively connected to the first connecting plate and the second connecting plate; the first connecting plate is provided with the rotating shaft on the back side connected to the connecting rod; the inner side of the second connecting plate is connected to the connecting rod, and the outer side of the second connecting plate is connected to the swing mechanism.

5. The self-cleaning plate heat exchanger according to claim 4, characterized in that: The driving member is a driving motor; the swing mechanism includes a reducer; It also includes a dustproof shell, in which the driving motor and the reducer are both arranged; the dustproof shell is provided with a door body and a heat dissipation window.

6. The self-cleaning plate heat exchanger according to claim 5, characterized in that: The reducer includes a housing, and a first rotating member and a second rotating member arranged in the housing; the drive motor includes a motor shaft; the first rotating member includes a first gear drivingly connected to the motor shaft, and a second gear transmission-connected to the second rotating member.

7. The self-cleaning plate heat exchanger according to claim 6, characterized in that: It also includes a control unit for controlling the operation of the driving motor, and the control unit is connected to the driving motor; the control unit controls the motor shaft to rotate in a forward direction or a reverse direction.

8. The self-cleaning plate heat exchanger according to claim 7, characterized in that: One end of the second rotating member is transmission-connected to the second gear via a third gear, and the other end of the second rotating member is connected to the second connecting plate; the diameter of the first gear is greater than the diameter of the second gear.

9. The self-cleaning plate heat exchanger according to claim 1, characterized in that: On the same connecting rod, the number of the cleaning members is not less than the number of the heat exchange plates; and the total length of the cleaning members is greater than the length of the heat exchange plates.

10. The self-cleaning plate heat exchanger according to claim 1, characterized in that: The gap between two adjacent heat exchange plates is 2-3 mm.

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